/*! Copyright (c) 2009 Brandon Aaron (http://brandonaaron.net)
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
* Thanks to: http://adomas.org/javascript-mouse-wheel/ for some pointers.
* Thanks to: Mathias Bank(http://www.mathias-bank.de) for a scope bug fix.
*
* Version: 3.0.2
*
* Requires: 1.2.2+
*/

(function($) {
	var types = ['DOMMouseScroll', 'mousewheel'];
		$.event.special.mousewheel = {
		setup: function() {
	if ( this.addEventListener )
	for ( var i=types.length; i; )
	this.addEventListener( types[--i], handler, false );
	else
	this.onmousewheel = handler;
},

teardown: function() {
	  if ( this.removeEventListener )
	  for ( var i=types.length; i; )
	  this.removeEventListener( types[--i], handler, false );
	  else
	  this.onmousewheel = null;
	}
};


$.fn.extend({
	mousewheel: function(fn) {
	return fn ? this.bind("mousewheel", fn) : this.trigger("mousewheel");
},

	unmousewheel: function(fn) {
	return this.unbind("mousewheel", fn);
	}
});

function handler(event) {
	var args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true;
	event = $.event.fix(event || window.event);
	event.type = "mousewheel";
	if ( event.wheelDelta ) delta = event.wheelDelta/120;
	if ( event.detail ) delta = -event.detail/3;

	// Add events and delta to the front of the arguments

	args.unshift(event, delta);
	return $.event.handle.apply(this, args);
}

})(jQuery);